Lua Mag-Card Door

p = peripheral.wrap("bottom")
pw = "io"
if fs.exists("mgpw") then
 print("Password file found")
 h = fs.open("mgpw", "r")
 pw = h.readLine()
 h.close()
else
 print("Password file not found!")
 print("You will need to setup a card.")
 write("The password to be stored on the magcard: ")
 ag1 = read()
 write("The label of the magcard: ")
 ag2 = read()
 print("The password will be "..ag1.." and the label will be "..ag2..". Insert the magcard.")
 p.beginWrite(ag1, ag2)
 print("Waiting for card to write to...")
 event,arg1,arg2,arg3 = os.pullEvent("mag_write_done")
 h = fs.open("mgpw", "w")
 h.write(ag1)
 h.close()
 print("Operation complete. Rebooting...")
 sleep(1)
 os.reboot()
end
print("Waiting for card")
event,arg1,arg2,arg3 = os.pullEvent("mag_swipe")
if arg1 == pw then
 print("Correct card")
 rs.setOutput("left", true)
 sleep(2)
 rs.setOutput("left", false)
else
 print("Incorrect card")
end
sleep(1)
os.reboot()